Two pictures with the exact same face.
But, in one photo you see a girl and in the other one - a guy.
The fact is that this face was created on computer by mixing male and female face features, which gave this androgynous face. With a change of contrast, our brain recognizes the face on the left as being a female one, while on the second photo, where contrast is higher, our brain recognizes it to be a male’s face. For me, this is the best optical illusion of the century.
I … I don’t see it? I see the contrast is different, but… they both look like an adolecent of possibly either gender. I guess I don’t see enough pictures of women in makeup? Or I analyze the shapes before the colors?
This honestly is less of an illusion and more of a demonstration of what we’re trained to look at and expect from images of 17-30 year old white people (coincidentally, or maybe not, the most commonly presented demographic in mass media).